8223407279 has 4 divisors (see below), whose sum is σ = 8224563120. Its totient is φ = 8222251440.

The previous prime is 8223407273. The next prime is 8223407299. The reversal of 8223407279 is 9727043228.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8223407279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8223407273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567182 + ... + 581499.

It is an arithmetic number, because the mean of its divisors is an integer number (2056140780).

Almost surely, 2^8223407279 is an apocalyptic number.

8223407279 is a deficient number, since it is larger than the sum of its proper divisors (1155841).

8223407279 is a wasteful number, since it uses less digits than its factorization.

8223407279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155840.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 8223407279 is about 90683.0043558329. The cubic root of 8223407279 is about 2018.4466114328.

The spelling of 8223407279 in words is "eight billion, two hundred twenty-three million, four hundred seven thousand, two hundred seventy-nine".